What kind of math should i know for these questions? ive done a few but now they seem to include math that i dont know.

So what should i learn?

## What kinda math should i know?

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### Re: What kinda math should i know?

"Elementary number theory" will help with an awful lot of them. "Enumerative combinatorics" is also a popular topic. It helps to be able to recognise a Markov process and know how to analyse it with linear algebra. There are plenty of probability questions, so you'll need to know what expectation is and techniques for calculating it.

Also, if you read the threads which you unlock when you solve a problem, the techniques which people mention are often key to solving later problems in the same area.

Also, if you read the threads which you unlock when you solve a problem, the techniques which people mention are often key to solving later problems in the same area.